Pioneer DV-353-K Service Manual - Page 69

Pioneer DV-353-K Manual

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No. Symptoms 5 Cannot playback (Focus does not inn) 6 Cannot playback (Spindle does not turn) 7 Cannot playback (Playback stops) 8 Picture disturbance during playback (block noise, freeze, other) 9 Audio is not output (Picture is normal) Diagnosis contents Is a signal output by IC351-pin 9, 10? Defectiveness assumption points FTS Driver IC (IC351) Does 650 LD emit light? Does a pickup lens do up /down? Does not an actuator spring turn? PICKUP Are not resin part damage, a shaft missing? Are not there falling off of turn table, lean abnormality? Mechanism Assy Is not there wire rod coming out of CN151? Is not PU flexible cable damaged? Flexible cable / connector Is signal output by IC301-pin 123 (FACT)? (Device control of around 500mV is output usually. It is ± around 100mV L6315 (FRONT END IC: IC301) swing by focus up / down.) Is a signal output by IC251-pin 2(A3), 4(A2), 7(A1)? It is fixed, and is not there IC251-pin 18 HIGH whether it is fixed, and there is not IC251-pin 23 LOW? Spindle Driver IC (IC251) Are not there part falling off, alien substance adhesion in spindle motor part? Mechanism Assy (Spindle motor) Are not there wire rod coming out, damage in CN251? Flexible cable / connector Is signal output by IC301-pin 123 (SPDL_PDM)? L6315 (FRONT END IC: IC301) Does not 650nLD deteriorate? If there is the both ends voltage of R121 more than 0.7V, 650nLD deteriorates surely. Does not 780nLD deteriorate? If there is the both ends voltage of R123 more than 1.2V, 780nLD deteriorates surely. Is not there abnormality in FG waveform? 650nLD deteriorates. (Cannot playback DVD) 780nLD deteriorates. (Cannot playback CD) FG output: Spindle Driver IC (IC251) Are not there wound and a dirt on the disc? Disc Are not there wound and a dirt on the disc? Do not you set a disc of standard outside? Disc Check the waveform (BCK, LRCK, MCLK, DATA). Is signal output by IC711-pin 7, 8? STI5519 (BACK END IC: IC601) AUDIO DAC IC (IC711) DV-353-K 69

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